User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0 Build ID: 20130215130331 Steps to reproduce: In KDE (using KWin) opened two Firefox windows on different virtual desktops. Dragged a tab from one window with a mouse, intending to move it to another window on the different virtual desktop. Actual results: Tab can't cross the border of the virtual desktop. Expected results: Tab had to cross the border of the virtual desktop to another one (this works in Gnome). In order to perform the drag, one needs to explicitly detach the tab into a separate window first, and then move it (which is not optimal).
Component: Untriaged → Widget: Gtk
Product: Firefox → Core
As a workaround, one can drag the tab on to the "pager" widget to a section corresponding to the needed virtual desktop. This will switch the desktop, and one can finish dragging the tab to the needed window.
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